Pepe Le Moko, a thief who escaped from France with a fortune in jewels, has for two years lived in, and virtually ruled, the mazelike, impenetrable Casbah, "native quarter" of Algiers. A French official insists that he be captured, but sly Inspector Slimane knows he need only bide his time. The suave Pepe increasingly regards his stronghold as also his prison, especially when he meets beautiful Parisian visitor Gaby, who reminds him of the boulevards to which he dare not return...and arouses the mad jealousy of Ines, his Algerian mistress.